Arm-Wrestling Robot and the Control Method

Abstract

An arm-wrestling robot is disclosed, comprising basically an arm-force generation mechanism 10 and a control system 100 that detects the maximum arm-force of a user in the early stage of the match, generates a different game scenario each time, and executes force feedback control to implement the scenario.

Description

TECHNICAL FIELD[0001]The present invention relates to a service robot or an entertainment robot, and, more particularly, an arm-wrestling robot simulating human's arm-wrestling.BACKGROUND ART[0002]Conventional arm-wrestling devices may be classified roughly into three types according to the means of providing reaction force against player's arm-force. First type is to make use of spring force, and a typical example of this one is U.S. Pat. No. 3,947,025, in which the arm-wrestling exercise device is comprised of a helical coiled spring that has adjustable stiffness as shown in FIG. 1a. Other examples of this type are U.S. Pat. Nos. 6,652,428; 5,458,554; 5,431,616; 4,900,019; 3,662,602; and Russia Patent No. 2,128,539. As a similar one with this type, there is China Patent 2691654, in which the system is weight-loaded.[0003]The second type of arm-wrestling devices uses pneumatic or hydraulic cylinders, which is better than the previous spring type from the viewpoint of force manipula...

AI Technical Summary

Benefits of technology

"The present invention provides an arm-wrestling robot and control method that are not simple and are not easily bored. The robot detects the maximum arm-force of a user in the early stages of the match and automatically and randomly generates different arm-wrestling scenarios that the user cannot predict in advance. The robot uses force feedback control to implement the scenarios using feedback signals related to the motion of the mechanical arm and torque acting on the mechanical arm. The robot and control method increase and maintain the enjoyment of arm-wrestling by the way the user's will to win affects the winning probability of the match."

Problems solved by technology

The second type of arm-wrestling devices uses pneumatic or hydraulic cylinders, which is better than the previous spring type from the viewpoint of force manipulability, however disadvantages of this type are that the system becomes complicated and bulky because of the supplementary devices for pneumatic or hydraulic pressure generation, and so possibly becomes expensive.

If a player generates a bigger force than the arm-wrestling device, then he will win, and, otherwise he will lose the game.

Therefore, it has a deficiency that the player is soon bored with the arm-wrestling device after a few trials.

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